Cassiterite and Catapleiite Optical Properties

Cassiterite

Catapleiite

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1 Optical Properties

1.1 Luster

Adamantine, Greasy

Vitreous

1.2 Pleochroism

Pleochroic haloes have been observed. Dichroic in yellow

Not Available

1.3 Dispersion

0.07NA

0.007 1

1.4 Transparency

Transparent, Translucent

TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)

1.5 Refractive Index

1.990-2.1051.590-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Monoclinic Prismatic H-M Symbol (2/m) Space Group: B2/b (pseudo-HEX)

1.8 Birefringence

0.096-0.0980.039

0 0.296

1.9 Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

Cassiterite and Catapleiite Optic Character

Cassiterite and Catapleiite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Cassiterite and Catapleiite Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Cassiterite and Catapleiite optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

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Cassiterite and Catapleiite Transparency

Similar to their colors, Cassiterite and Catapleiite transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Cassiterite is Translucent and Transparent while Cassiterite is Translucent and Transparent in appearance.